Correction: Do urology journals enforce trial registration? A cross-sectional study of published trials

Kunath F, Grobe HR, Keck B, et al. Do urology journals enforce trial registration? A cross-sectional study of published trials. BMJ Open 2011;1:e000430. doi: 10.1136/bmjopen-2011-000430

In relation to an issue raised by a reader regarding some minor overlap between this paper published in BMJ Open (10.1136/bmjopen-2011-000430) and one published in Urologia Internationalis (Do journals publishing in the field of urology endorse reporting guidelines? A survey of author instructions. Kunath F, Grobe HR, Rücker G, Engehausen D, Antes G, Wullich B, Meerpohl JJ. Urol Int 2012;88:54–9. doi:10.1159/000332742. Epub 19 Nov 2011) we would like to clarify:

Both publications are based on the same set of journal author's instructions. However, they were evaluated separately and one after the other for the individual research questions several weeks apart. Obviously, both projects address different issues. Due to the same data sources, both publications include a minor section of text that is similar. Citation...

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